Surface Free Energy of Viscoelastic Thermal Compressed

Petrič, Wood M.; Kutnar, Andreja; Kričej, Borut; Pavlič, Matjaž; Kamke, Frederick A.; Šernek, Milan

doi:10.1163/ej.9789004169326.i-400.131

Cited by 7 publications

(5 citation statements)

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“…Table 4 also shows that the contact angle of diiodomethane increased with thermal modifi cation of beech wood and was higher on thermally modifi ed wood at 190 ° C than at 212 ° C. In the literature there are various data for the contact angle of diiodomethane on wood, from values of more than 70° on spruce wood (Picea abies L.) and meranti wood (Shorea spp.) (De Meijer et al, 2000) to values not signifi cantly higher than 0 ° on viscoelastic thermal compressed wood (Petrič et al, 2009). From the three test liquids, the smallest dissipation of the contact angle measurements was recorded for the water.…”

Section: Determination Of Contact Angle Of Waterborne Coating 23 Odmentioning

confidence: 88%

Influence of Thermal Modification on Surface Properties and Chemical Composition of Beech Wood (Fagus sylvatica L.)

Miklečić

Jirouš-Rajković

2016

Drvna ind.

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Section: Determination Of Contact Angle Of Waterborne Coating 23 Odmentioning

confidence: 88%

Influence of Thermal Modification on Surface Properties and Chemical Composition of Beech Wood (Fagus sylvatica L.)

Miklečić

Jirouš-Rajković

2016

Drvna ind.

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“…(Bray 1963;Kramer et al 1988;Paavilainen and Torgilsson 1994;Syrjanen et al 1994;Nurmi 1997;Lässig and Močalov 2000;Schulze et al 2002;Stener and Hedenberg 2003;Matthews and Mackie 2006;Wagenführ 2007;Kaltschmitt et al 2009;Sernek et al 2010;Günther et al 2012;Karl 2012;Viöl et al 2012;EngineeringToolBox 2013;PaperonWeb 2013) Alnus glutinosa (Kramer et al 1988;Nurmi 1997;Johansson 2000;Schulze et al 2002;Mohammed-Ziegler et al 2004;Wagenführ 2007;Kaltschmitt et al 2009;Kiaei and Samariha 2011;Karl 2012) Populus spp. (Boehme and Hora 1996;Diamantidis and Koukios 2000;Barsoum 2001;Deiller et al 2001;Benetka et al 2002;Laureysens et al 2003;Helle and Schleser 2004;Matthews and Mackie 2006;Rutz et al 2006;Wagenführ 2007;Trnka et al 2008;Kaltschmitt et al 2009;Petrič et al 2009;Sernek et al 2010;Ráhel' et al 2011;Karampinis et al 2012;Karl 2012;...…”

Section: Methodsunclassified

“…Populus deltoides (Ilstedt and Gullberg 1993;Boehme and Hora 1996;Liesebach et al 1999;Bungart et al 2000;Diamantidis and Koukios 2000;Woods 2008;Kaltschmitt et al 2009;Petrič et al 2009;Christersson 2010;Pande and Dhiman 2010;Sannigrahi et al 2010;Sernek et al 2010;Ráhel' et al 2011;Huda et al 2012;Karl 2012) Salix spp. (Wilén et al 1996;Labrecque et al 1997;Bungart et al 2000;Diamantidis and Koukios 2000;Lässig and Močalov 2000;Barsoum 2001;Deiller et al 2001;Rutz et al 2006;Wagenführ 2007;Wilkinson et al 2007;Bridgeman et al 2008;Woods 2008;Kaltschmitt et al 2009;Kord and Kord 2011;Buček et al 2012;Karampinis et al 2012;Karl 2012;EngineeringToolBox 2013) Fraxinus excelsior (Bray 1963;Kramer et al 1988;Neirynck et al 2000;Deiller et al 2001;Mohammed-Ziegler et al 2004;Ritter et al 2005;Matthews and Mackie 2006;Petritan et al 2007;Wagenführ 2007;Kaltschmitt et al 2009;…”

Section: Methodsunclassified

Evaluating the Competition of Lignocellulose Raw Materials for their Use in Particleboard Production, Thermal Energy Recovery, and Pulp- and Papermaking

Trischler¹,

Sandberg²,

Thörnqvist³

2014

BioResources

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There is increasing competition for raw materials between particleboard production, thermal energy recovery, and pulp-and papermaking. According to different scenarios, the consumption of lignocellulosic raw materials is increasing, which means that the competition is increasing. The primary production of lignocellulosic raw material in some regions may therefore reach the limit of sustainability; i.e., the lignocellulosic raw material must be used more efficiently to reduce the risk of a shortage. The physical and chemical properties of the lignocellulosic raw material of selected species have therefore been surveyed, and the raw material properties that are important for each of the three competitors have been defined. The aim of the study is to characterise the lignocellulosic raw materials according to the three competing users and to show whether they are high or low in competition. As methods, a relative ranking of the species regarding their raw material properties and regarding the requirements of the competitors as well as cluster analysis were chosen. The results show that the most favourable raw materials are from coniferous species, while monocotyledon species show an opposite trend.

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“…The second important factor affecting the greater absorption of agents, which translates into a higher application rate, is the lower density of TM wood as a result of mass loss, which is a consequence of chemical changes occurring during modification at high temperature. Wood with a lower density is characterized by a greater surface porosity and roughness, which are increased after heat treatment [56], and has less surface free energy [57][58][59].…”

Section: Wood Density the Application Rate Of Agents And Film Thicknessmentioning

confidence: 99%

“…of mass loss, which is a consequence of chemical changes occurring during modification at high temperature. Wood with a lower density is characterized by a greater surface porosity and roughness, which are increased after heat treatment [56], and has less surface free energy [57][58][59].…”

Section: Wood Density the Application Rate Of Agents And Film Thicknessmentioning

confidence: 99%

Influence of Thermal Modification in Nitrogen Atmosphere on Physical and Technological Properties of European Wood Species with Different Structural Features

et al. 2022

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The wood of five European species: black poplar (Populus nigra L.), European beech (Fagus sylvatica L.), European ash (Fraxinus excelsior L.), European oak (Quercus robur L.), and Scots pine (Pinus sylvestris L.) was subjected to thermal modification in nitrogen atmosphere at 190 °C during 6 h. Native and modified wood was varnished and oiled in industrial conditions. Thermally modified (TM) wood was characterized by a greater absorption of varnish and oil when applying the first layer to the surface, which finally resulted in higher application values compared to native wood. In particular, after varnishing, there was a significant increase in gloss and radical change of colour. Regardless of the wood species, finishing process (varnishing, oiling), the ΔE values were close to or higher than 6, which proves high colour changes. Modified poplar, ash, and oak after varnishing had a different colour (ΔE higher than 12). The surface colour changes as a result of UV photoaging was individual, depending on the wood species and the method of finishing. In the case of the thickness of varnish coatings, the wood structure was important, i.e., on ring-porous hardwood and softwood they were thicker. In the case of wood species with a lower density, i.e., black poplar and pine, the thermal modification in nitrogen atmosphere process did not reduce the resistance of the varnish coat, and in the case of species with a higher density (oak, ash, beech) it decreased by one level. Thermal modification reduced the Brinell hardness of wood with wide rays (oak and beech) by 11%. The applied process of surface finishing by double varnishing or oiling did not significantly change the hardness of tested wood.

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Surface Free Energy of Viscoelastic Thermal Compressed

Cited by 7 publications

References 0 publications

Influence of Thermal Modification on Surface Properties and Chemical Composition of Beech Wood (Fagus sylvatica L.)

Influence of Thermal Modification on Surface Properties and Chemical Composition of Beech Wood (Fagus sylvatica L.)

Evaluating the Competition of Lignocellulose Raw Materials for their Use in Particleboard Production, Thermal Energy Recovery, and Pulp- and Papermaking

Influence of Thermal Modification in Nitrogen Atmosphere on Physical and Technological Properties of European Wood Species with Different Structural Features

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